Drive for roving frames



April 13,1926. 1,580,308

v D. C. LAWSON DRIVE 'FOR ROVING FRAMES Filed Jan. l5, '1924 p'ensated .Patented Apr. 13, '1926.

' vUNITED STATESw 1,580,308 PAg ENT oFFlcE.v

DAVID C. LAWSONQOI XNOXVILLE, TENNESSEE, ASBIGNR 0l' ONE-HALF T0 LAW- BENCH D. TYBON,

ONE-EIGHTH T0 B. W. DUGGAN, AND ONE-EIGHTH TO I. A.

sgromr, LL or xNoxvILLa, rnNNnssaa.

mnvn lJion novnre saurai! appuaon aleaganuary 15, 1m. Lsmar- T o all whom it may concern.'

Be it known that I, DAVID (i. LAwsoN,'a citizen of the United States, residing at Knoxville, in the county of Knox and btate of Tennessee, have invented certain new and useful Improvements in Drives for Roving Fra-mes, of which the following is a specification.

This invention relates to improvements in drives for rovingvframes. I

Heretofore it has been customary to transmit power to the bobbin drive shaft by a train of intermeshing gears, but it has been found impracticable to operate this type of gearing at a' high rate` of speed, when installed in this articular relation, and furthermore consi erable power is required to operate. this type of rgearing. 'It is; proposed to employ sprocket and chain gearing for such a drive, and the object of the present invention is to provide means whereby any slack in the cham may be readily comfor so that a constant and uniform tension will be maintained on the chain and thereby provide against an irregular transmission of power to the bob in drlvlng shaft. In the accompan'in drawing: Figure 1 is a si e e evation of the drive embodying the invention;

which is provided at its Figure 2 is a sectional view Aon the line 2 2 of Figure 1;

Figure 3 is aview in side eleva-tion of one of the eccentricbearings for the intermediate shaft of the drive.

In Fi re 1 of the drawings there is'illustrate so much of a roving frame as is necessary to an understanding of the invention and in this figure the numeral 1 indicates one of the u ri ht sides of the machine. The umera 2 indicates the bobbin drive. shaft, and the numeral 3 indicates the main drive shaft. The bobbin drive shaft 2, together with, its companion shaft (not shown), is mounted in a head 4 vertically adjust-ably supported u on the side member 1. The numeral 5 in icates in general a housing for the drive and this housing comprises a top 6 and sides 7. .The sides 7 are provided with rearward extensions 8 which are in turn provided with bearings 9 at their rear ends to loosely fit the bobbin drive shaft 2. The numeral 10 indicates an arm lower end with a bearing 11 loosely fitting the shaft 3, and

this arm at its upper end has a bearing o nmg 12 to loosely receive the interme iate or counter-shaft of the drive which is indicated by the numerall 13. A sprocket .gear 14 is fixed upon the Inain drive shaft 3, and a sprocket chain 15 is trained about ilus gear and about one sprocket of a double or twin sprocket gear. indicated in) general by ...the numeral 16. The'` said double sprocket comprises asleeve 17 loosely fittin t e shaftl, and sprockets 18 and 19 whic -are suitablyspaced upon the sleeve, the

sprocket chain 15 being trained/about the gear 18 as shown in Fig. 2 of the drawing. A sprocket chain 20 is trained about the sprocket gear 19 and also about the sprocket gea-r 21 fixed upon the Wbbin drive shaft 2. 1t tlus point it will be evident that power 1s transmitted continuously from the shaft 3 to the bobbin drive shaft 2 and that the head 4 .which supports the shaft 2 and its companion head (notshown) may have up and down movement upon the side members of the fra-me without interfering with the communication of power to the said bobbin drive shaft.

As heretofore stated the invention contemplates the provision of means for taking u slack in the drive chains 15 and 20, and th1s is accomplished by providing an eccentric mountingfor the shaft 13 as will now be explained. The side members 7 of the hood 5 are provided with bearing openings 22, and rotatably fitted in each of these openings is a bearing indicated in general by the numeral Each bearing 23 comprises a cylindrical body portion 24 which rotatably fits within the respective openin 22 and which is provided at its inner en with an annular circumscribing flange 25 which seats against the inner face of the respective side member 7 of the hood. Anopening 26 is formed in. each bearing member and is of cylindrical contour and is so arran ed that its axis is eccentric to the axis of tie body member of the bearing as most clearl shown in Figure 3 of the drawings. uts lare threaded onto the ends of the shaft and prevent-displacement of the shaft with relation to the bearings 23 and likewise hold the bearings 23 in place within the o enngs 22. The

twobearings 23 have their anges 25 formed the bearing members so that the shaft may be adjusted with relation to the shafts 2 and Il so as to equally tension the chains 15 and 2l).

From the foregoing description of the invention it will be seen that there is provided a highly eli'ective means for adjusting the intermediate or counter-shaft 13 so as to take up slack in either of the chains l5 und 20, and that an exceptionally fine degree of adjustment may he obtained so that the two chains may be equally tensioned thereby insuring a steady and uniform transmission oit power to the bobbin drive shaft 2.

Having thus described the invention, what is claimed as new is:

'the eombinatirm, in a jointed l'rame drive, of a main drive shaft, a driven shaft, a hood having side members and arms extendine therefrom and swingingly connected with the driven shaft, an arm swingingly connected with the main drive shaft, means supporting the driven shaft for up and down movement with relation to the main drive shaft, the hood having cylindrical openings in its opposite walls, bearing menibers having cylindrical portions rotatably adjustably fitted in the openings, the said weones bearing members having openings in their said cylindrical portions located eccentrically to their axes, said bearing members being each provided with a circumferential flange at its inner end bearing against the inner side of the wall of the hood in Which its cylindrical portion is fitted, the outer ends of the said cylindrical portions of the bearings being flush with the outer surfaces ot' the respective Walls, a shaft mounted at its ends in the openings in the bearings, a double sprocket freely rotatably mounted upon the shaft between the flanged ends of the bear-ine members, means upon the ends of the sha t engaging the outer sides of the walls of the hood and the outer ends of the cylindrical portions of the bearing members to prevent longitudinal displacement of the said bearing members, the said shaft, and the double sprocket, the said `arm being pivotally connected with the shaft, sprocket gears upon the main drive shaft and driven shaft, and sprocket chains trained about the gears upon the said main drive shaft and driven shaft and about the double sprocket.

ln testimony whereof I atlix my signature.

DAVID C.,LWSON. [Le] l 

